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Type: Artigo de periódico
Title: Exciton States And Diamagnetic Shifts In Symmetric Coupled Double Gaas-ga1-xalxas Quantum Wells Within The Fractional-dimensional Approach
Author: Matos-Abiague A.
Oliveira L.E.
De Dios-Leyva M.
Abstract: We have extended the fractional-dimensional space approach to study exciton states and diamagnetic shifts in symmetric coupled double GaAs-Ga1-xAlxAs quantum wells. In this scheme, the fractional dimension is chosen using an analytical procedure, and the real anisotropic 'exciton + double quantum well' semiconductor system is mapped, for each exciton state, into an effective fractional-dimensional isotropic environment. We have performed calculations within the fractional-dimensional space scheme for the binding energies of 1s-like heavy-hole direct excitons and for the energy difference between 1s- and 2s-like direct heavy-hole exciton states in GaAs-Ga1-xAlxAs symmetric coupled double quantum wells. Also, theoretical results were obtained for the magnetic-field dependence of the 1s-like heavy-hole exciton energy shift and for the exciton diamagnetic coefficient in quantum wells and symmetric coupled double quantum wells. Fractional dimensional theoretical results are shown to be in good agreement with available experimental measurements and previous theoretical calculations.
Editor: IOP, Bristol, United Kingdom
Rights: fechado
Identifier DOI: 10.1088/0953-8984/12/26/315
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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